{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Compound 1b exhibited an appreciable antitumor activity in vivo against human H460 tumor xenograft , comparable to that of irinotecan at lower well - tolerated dose levels and superior to cisplatin ."}
{"Chemical": ["irinotecan", "cisplatin"]}